Cool Mist Humidity is produced by blowing air over or through a wick in water. The moist vapor is dispersed at room temperature. Cool Mists are available in console [floor standing units], central/whole house, multi room and single room [tabletop] humidifiers. Small humidifiers and single room humidifiers are available in both cool mist and warm mist types.
Warm Mist involves a heating element in the humidifier that heats the water before dispersing it into the air. We have found that smaller, less expensive warm mist humidifiers work much faster if you fill them with warm water! The addition of a heating element, usually has warm mist humidifiers be slightly more expensive to buy initially, and are a little more costly to run. We think that whether you prefer a cool or a warm mist humidifier, is a matter of personal preference and geography. Warm mist feels more comforting in a North Eastern United States winter bedroom or child’s room.
Air-O-Swiss is a warm mist humidifier brand.